package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * @Author FengHuan Wang
 * @Date 2025/1/10 11:22
 * @Version 1.0
 */
@Service
public class RepoetServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    /*根据时间取键统计营业额*/
    @Override
    public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        while (!begin.equals(end)){
            //日期计算，获得指定日期后一天的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("begin",beginTime);
            map.put("end",endTime);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(org.apache.commons.lang3.StringUtils.join(turnoverList,","))
                .build();
    }

    /*根据时间区间统计用户数量功能实现*/
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //总用户数
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            //新增用户数量
            Integer newUser = getUserCount(beginTime,endTime);
            //总用户数量
            Integer totalUser = getUserCount(null,endTime);
            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /*根据时间区间统计订单数量功能实现*/
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(! begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //每天订单总数集合
        List<Integer> orderCountList = new ArrayList<>();
        //每天有效订单集合
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate,LocalTime.MAX);
            //查询每天的总订单数
            Integer orderCount = getOrderCount(beginTime,endTime,null);
            //查询每天的有效订单总数
            Integer validOrderCount = getOrderCount(beginTime,endTime,Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //时间区间内的总订单数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //时间区间内的总有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompleteRate = 0.0;
        if (totalOrderCount != 0){
            orderCompleteRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        OrderReportVO orderReportVO = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompleteRate)
                .build();
        return orderReportVO;
    }

    /*销量排名前十功能实现*/
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime,endTime);
        String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()), ",");
        String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()), ",");
        SalesTop10ReportVO salesTop10ReportVO = SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
        return salesTop10ReportVO;
    }

    /*导出近期30天的运营数据功能实现*/
    @Override
    public void exportData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN),LocalDateTime.of(end,LocalTime.MAX));
        InputStream inputStream = null;
        try {
            inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            XSSFSheet sheet1 = excel.getSheet("Sheet1");
            sheet1.getRow(1).getCell(1).setCellValue(begin + "至" +end);
            XSSFRow row = sheet1.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            row = sheet1.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet1.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessDataVO.getTurnover());
                row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
                row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
                row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /*根据时间区间统计用户数量*/
    private Integer getUserCount(LocalDateTime beginTime,LocalDateTime endTime){
        Map map = new HashMap();
        map.put("begin",beginTime);
        map.put("end",endTime);
        return userMapper.countByMap(map);
    }
    /*根据时间区间统计订单数量*/
    private Integer getOrderCount(LocalDateTime beginTime,LocalDateTime endTime,Integer status){
        Map map = new HashMap();
        map.put("status",status);
        map.put("begin",beginTime);
        map.put("end",endTime);
        Integer count = orderMapper.countByMap(map);
        return count;
    }
}
